USPTO Patents Application 09803630

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PATENT SPECIFICATION <») 1 469 363

en

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(21) Application No. 2798/75 (22) Filed 22 Jan. 1975
(31) Convention Application No.

440 071 (32) Filed 6 Feb. 1974 in
(33) United States of America (US)
(44) Complete Specification published 6 April 1977

(51) INT. CL. 2 B62M 1/04

B62K21/00//F16H 31/00

(52) Index at acceptance

B7E 41 58 67
F2Q 1A1

(54) A RIDER PROPELLED CYCLE

(71) I, Robert Lee Sink, a citizen of
the United States of America, of 10 North
Edmondson, Indianapolis, Indiana, United
States of America, do hereby declare the
5 invention for which I pray that a patent
may be granted to me and the method by
which it is to be performed to be particu-
larly described in and by the following
statement : —

10 This invention relates to a cycle, which
in one embodiment to be described herein
is powered by the united effort of the arm,
leg, and trunk muscles of the operator.
The prior art encompasses a wide variety

15 of man-powered bicycles, tricycles, and the
like. While man-powered cycles do provide
a means of transportation, they also serve
to excercise a variety of the operator's
muscles. The majority of man-powered

20 cycles now available are designed to
exercise either the operator's shoulders and
arms, or his legs. The most common ex-
ample of a kg-powered cycle is the con-
ventional pedal-operated bicycle, while a

25 typical hand-powered device normally in-
cludes a crank which is manually rotated
by the operator to provide the required
driving force. Such a hand-powered cycle
is shown, for example, by Clark, U.S.

30 Patent No. 506,626.

These foot or hand-powered cycles only
provide adequate exercise for one portion
of the operator's anatomy. An additional
drawback encountered with the hand-

35 powered cycles is that they typically re-
quire separate and independent structures
to steer the cycle, making it difficult to
safely operate the driving and steering
mechanisms simultaneously.

40 A number of cycles have been developed
which combine the driving and steering
mechanisms to permit the cycle to be more
easily controlled. See, for example, Clark,
U.S. Patent No. 516,786. This cycle utilizes

45 a hand-operated driving lever which is

moved back and forth about a pivot to
provide force for the cycle. The driving
lever is also rotatable about its own axis
to provide turning motion to the steering
wheel of the cycle. This type of cycle is 50
limited to driving levers disposed wholly
above the steering wheel of the cycle and,
if the operator's feet are to be used to help
oscillate the lever, his feet must also be
positioned above the steering wheel. This 55
places the operator in an awkward position
with his hands and feet high above ground
and so makes control of the cycle difficult.
Moreover, if the lever is oscillated and
rotated simultaneously to drive the cycle 60
while turning, the lever necessarily moves
back and forth in a crossing motion through
the longitudinal plane of the cycle. Such
crossing motion continually shifts the
weight of the operator, making safe control 65
of the cycle extremely difficult.

The present invention provides a cycle,
comprising a frame having a seat mounted
thereon, rotatably mounted front and rear
wheels, said front wheel being carried by 70
a member pivotally mounted to said frame
to permit steering of the cycle, an upwardly
extending driving column pivotally mounted
intermediate its ends to said frame for
oscillatory movement in a plane parallel 75
to the plane of said frame, a one-way clutch
rotatably mounted on said frame, said
clutch having a first part and a second part,
said first part drivingly engaging said second
part upon rotation of said first part in a 80
first direction relative to said second part
to drive said second part in the same
direction, said first and second clutch
parts being in slipping engagement in
the event of rotation of said first part 85
relative to said second part in the
opposite direction to said first direc-
tion, a driving link pivotally coupled to
said column and to said first clutch part to
rotate said first clutch part in said first 90

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2

direction relative to the second clutch part
in response to pivotting movement of said
column in one direction about its pivotal
mounting to said frame; means coupling
5 said second clutch part to said rear wheel
to transmit rotational morion of said second
clutch part to said rear wheel, a steering
rod rotatably mounted on said driving
column for rotation about its own axis and

10 for oscillation with said column, the axis
of said steering rod being parallel to said
column, a handle bar rotatably mounted
to the upper end of said column and
coupled to said steering rod for oscillating

15 said column and for rotating said rod in
response, respectively, to oscillatory and
rotary forces applied thereto, a universal
joint at the lower end of said steering rod
and disposed substantially on the oscillatory

20 axis of said column, and means coupling
said universal joint to said member carrying
the front wheel to turn said front wheel
in response to -rotation of said steering
rod. Preferably a foot-rest is mounted on

25 the driving column so that the latter is
both hand and foot-operated, to provide
rigorous exercise for various portions of
the operator's anatomy, and permitting the
operator's feet to be disposed in a stable

30 position near the ground at all times.
Furthermore, the cycle can be steered as
the driving column is simultaneously and
safely oscillated since the oscillations are
always in the front-to-rear plane of the

35 cycle.

When the driving column is held station-
ary for coasting or is not moved in the
proper direction, the first clutch pan is
effectively rotating in a reverse direction

40 relative to the second clutch part. The slip-
ping engagement between the two clutch
parts permit the clutch parts to freely slip
while still maintaining a small drag force.
The drag force tends to carry the first

45 clutch part in a forward direction to
eliminate dead center linkage configura-
tions, in the embodiment to be described,
and further tends to move the driving
column in the direction necessary to obtain

50 full driving engagement between the first
and second clutch parts. This tendency of
movement by driving column thereby
serves as an indication to the operator of
the -direction he must move the column for

55 a propelling stroke after coastings for a
period.

An embodiment of the invention wiU now
be described, by way of example only, with
reference to the accompanying drawings, in
60 which:

Fig. 1 is a side elevation view of a cycle
embodying the invention;

Fig. 2 is a sectional view taken along
the line 2-2 of Fig. 1
65 Fig. 3 is a sectional view taken along the

lane 3-3 of Fig. 1;

Fig. 4 is a sectional view taken along the
line 4-4 of Fig. 1

Fig. 5 is a cross-sectional end view of a
one-way clutch of the cycle; 70

Fig. 6 is a side view, partially in section,
of the clutch shown in Fig. 5;

Fig. 7 is a top plan view of the cycle;
and

Fig. 8 is a sectional view taken along the 75
line 8-8 of Fig. 3.

A cycle of this invention is shown in
Fig. 1 and generally comprises a frame 10
on which a rear driving wheel 12 and a
front steering wheel 14 are rotatably 80
mounted. A driving and steering assembly
16 is pivotally mounted on the frame 10
and is independently coupled to the rear
wheel 12 through a one-way clutch 18,
and to the front steering wheel 14 through 85
a steering bar 20.

The frame 10 is formed of metal bicycle
tubing or the like and includes a front bar
22 and a rear bar 24 integrally inter-
connected by a sloping center bar 26 on 90
which the driving and steering assembly is
mounted by a clamping block 27 which
carries a pivot for the assembly. The front
bar 22 is generally horizontal and is dis-
posed above and to the rear of the front 95
wheel 14. A front wheel fork 28 is pivotally
coupled to the forward end of the front
bar 22 by a typical bearing assembly (not
shown). The front wheel 14 has an axle 30
which is rotatably mounted, as by bearings, 100
between the tines 29 of the fork 28 near
the lower ends thereof as shown best in
Fig. 3.

The rear bar 24 of the cycle frame 10
is also generally horizontal but is disposed 105
below and to the rear of the front bar 22.
the rearward end 31 of the rear bar 24
is rigidly connected to a rear wheel fork
32 which extends rearwardly therefrom in
the same horizontal plane as the rear bar 110
24. The rear driving wheel 12 has an axle
34 which is rotatably mounted, as by bear-
ings, between the tines of the fork 32 near
the rearward end thereof to permit free
rotation of the wheel. 115

A seat bar 36 is rigidly mounted on the
frame 10 and extends horizontally and
rearwardly from the center bar 26 adjacent
the junction of the latter with the front
bar 22. As shown in Fig. 1, the rear portion 120
of the seat bar 36 is supported above the
rear wheel 12 by a support yoke 38 which
is secured between the seat bar 36 and
the rear wheel fork 32. A seat 40 is secured
on the seat bar 36 as by a clamp 42 and 125
is positioned on the bar to the rear of the
driving and steering assembly 16. The posi-
tion of the clamp 42 can be adjustably
altered to permit the operator to selectively
vary the distance between the seat 40 and 130

3

1 469 363

3

the driving and steering assembly 16.

As shown in Fig. 2, the driving and steer-
ing assembly 16 has a driving column 43
which is comprised of a driving yoke 44

5 which is pivotally mounted to the center
bar 26 of the frame 10 by the pivot carried
by clamping block 27. The yoke 44 is
formed of a pair of generally parallel bars
48 which are maintained in spaced relation

10 by spacers 50 that are connected between
the bars 48 at their ends. The bars 48
are each coupled intermediate their ends
to opposite ends of a spindle 52 which is
contained in and supported by the clamping

15 block 27.

More specifically, as best shown in Fig.
3, the clamping block 27 is comprised of
two block parts 56 and 58, each having a
semi-circular section slot 57 and 59 therein,

20 for mutually receiving the center bar 26
of the frame 10 at a point intermediate the
ends of the center bar. Bolts 62 are used
to tightly clamp the block parts 56 and 58
together. The spindle 52 is carried in the

25 first block part 56 of the Mock 27 and is
free to rotate about its axis with respect
to the block 27. The spindle 52 is
orthogonally disposed to the frame 10,
thereby permitting the yoke bars 48 to be

30 freely oscillated about a horizontal axis and
in close parallel relationship to the vertical
plane containing the front, center, and seat
bars 22, 26, and 36. The amplitude of the
preferred forward and rearward oscillation

35 of the yoke bars 48 is shown by dotted line
positions 61 and 63 in Fig. 1.

A horizontally disposed handle bar 64 is
secured to a stem 66 which is rotatably
mounted in the upper yoke bar spacer 50

40 to permit free rotation of the handle bar
64 with respect to the driving yoke 44 for
reasons which will hereafter become more
apparent. Conveniently, soft rubber hand
grips 68 or the like are mounted over each

45 end of the handle bar 64.

Footrests 70 are mounted at the lower
ends of the yoke bars 48 and extend out-
wardly from each side of the driving yoke
44 in the general plane of the yoke. If

50 desired, the footrests 70 and the lower
spacer 50 can be unitarily formed of a
single metal bar which is fixed to the bottom
ends of the yoke bars and can be adjusted
up and down for rider comfort and reach.

55 The handle bar 64 and the footrests 70
are provided to apply oscillatory movements
to the driving column 43 about its axis
and in the plane of the frame 10. By grasp-
ing the handle bar 64 and by engaging the

60 footrests 70, an operator can, with a com-
bined pushing and pulling action of his
arms, legs, and trunk muscles, move the
column 43 back and forth.
As shown in Fig. 1. a driving link 72 is

65 pivotally coupled at one end of the yoke

bars 48 near the lower end of the driving
column 43. The opposite end of the driving
link 72 is pivotally coupled to one end of
a crank link 74 which is fixedly mounted
to the one-way clutch 18. The oscillatory 70
movement of the driving column 43 is trans-
mitted by the driving link 72 and the crank
link 74 to the clutch 18 which converts
the back and forth motion of the cokmn
into rotational motion. The relative lengths 75
of the driving link 72 and the crank link
74 affect the stroke distance of the
oscillatory movement of the yoke 44.
Desirably, the link lengths are chosen so
that neither link comes unduly close to the 80
ground and so that the driving yoke 44 can
be oscillated through an angle of approxi-
mately 30° to either side of the vertical.
Also, if desired the crank link 74 can have
a series of holes 84 spaced along its length ^ 5
to which the driving link can be selectively
coupled to alter the driving torque required
to rotate the clutch 18.

The one-way clutch 18 generally com- qft
prises a clutch plate 76 and a clutch housing
78. As shown in Figs. 4-6, both the clutch
plate 76 and the clutch housing 78 are
rotatably mounted on a spindle 80 which
is journalled in suitable bearings 82
mounted on the rear bar 24 of the frame 95
10. The plate 76 and housing 78 are freely
rotatable on the spindle 80 with respect to
the frame 10, and are retained on said
spindle by a hub 83. The crank link 74
is fixedly coupled to the outside face of 100
the clutch plate 76 to transmit the
oscillatory motion of the driving yoke 44
to the plate. Pawls 86 are mounted on the
inside face of the clutch plate 76 and are
adapted to frictionally engage an inner 105
drum face 94 of the clutch housing to
drive the housing 78 along with the plate
76 in a first direction of rotation of plate
76. F

More specifically, and as shown in Fig. 110
6, three generally L-shaped pawls 86 are
pivotally mounted on the inside face of the
clutch plate 76 by pins 88 extending through
the radially inward portions of the pawls.
The pawls 86 each have smooth rounded 115
corners, and are disposed in equally spaced
arcuate relation about the clutch plate 76.
The foot portion 90 of each pawl 86 is
generally rounded to correspond to the
circular inner drum face 94 formed on 120
the inside face of the clutch housing 78.
A suitable friction facing 92 is bonded to
the drum contacting surface of each foot
90 to enhance frictional engagement be-
tween the pawls 86 and the drum face 94. 125

Clockwise rotation as viewed in Figure
6, of the clutch plate 76 by the driving
link 72 is effective to cause full, immediate
driving engagement between the pawl feet
90 and the clutch housing drum face 94 130

4

1469 363

4

which accordingly drives the housing. If,
on the other hand, the driving column 43
is held stationary or is oscillated so as to
cause a counterclockwise rotation of the
5 clutch plate 76, the full driving engagement
of the pawl feet 90 is eliminated. However,
springs 91 are coupled between the foot
90 of each pawl 86 and respective flanges
93 protruding from the inner face of the
iO clutch plate 76. Each spring 91 is in a
partially compressed state to thereby urge
its associated pawl 86 about its respective
pivot pin 88 and into continual, slipping
engagement with the drum face 94 of the
15 clutch housing 78 when the clutch plate is
held stationary or is rotated in a counter-
clockwise direction, The slipping engage-
ment permits the clutch plate 76 to free-
wheel relative to the housing 78 in the
20 counterclockwise direction.

As previously mentioned, when the clutch
plate 76 is driven in a clockwise direction,
the pawls 86 engage the drum face 94 of
the clutch housing 78 to also drive the
25 clutch housing 78 in a clockwise direction.
A large sprocket wheel 98 is fixedly
mounted as by bolts 99 to the outside face
of the clutch housing 78, and rotates in a
clockwise direction whenever the clutch
30 housing is so driven. As shown best in Fig.
1, a small sprocket wheel 100 is coupled to
the rear axle 34 of the cycle, and rotational
motion of the large sprocket wheel 98 is
transmitted to the small sprocket wheel
35 100 by a bicycle chain 102 interconnecting
the two sprocket wheels. The rear wheel 12
of the cycle is thereby driven in a clockwise,
or forward, direction whenever the clutch
housing 78 is similarly driven.
40 During operation, the cycle is propelled
as the operator utilizes his arm, leg, and
trunk muscles to push and pull the driving
yoke 44 through an oscillatory motion
about the axis of the spindle 52. A s pre-
45 viously described, this oscillatory motion is
transmitted through the driving link 72 to
the clutch plate 76 to thereby rotationally
drive the clutch plate. Whether the clutch
plate 76 is initially driven in a clockwise
50 or a counterclockwise direction depends
upon the direction in which the driving
yoke 44 is first moved. For example, if the
yoke 44 is inadvertently moved initially in
a direction to cause counterclockwise rota-
55 don, and thus freewheeling, of the clutch
plate 76, then the operator can correct the
problem simply by reversing the direction
of yoke movement. This causes the links
72 and 74 to reverse the direction of rota-
60 tion of the clutch plate to drive the cycle.
Whenever, at anytime during operation, the
direction of yoke movement is reversed in
the middle of a stroke, the direction of
clutch plate rotation will be reversed. That
65 is, the operator must move the yoke com-

pletely to the end of each stroke, or the
direction of rotation of the clutch plate
will be reversed Therefore, as the cycle
is ridden, power stroking with the yoke 44
can be started and stopped as desired, but 70
to resume power stroking the operator
must move the yoke in the correct direction
to properly rotates the clutch plate. If he
moves the yoke in the incorrect direction,
the clutch will simply freewheel and indi- ?5
cate to the operator that he must reverse
yoke movement to again propel the cycle.

Whenever the cycle is moving but the
operator has temporarily stopped power
stroking in order to coast, the clutch nous- 80
ing 78 will continue to rotate along with the
rear wheel 12. Since the yoke 44 is being
held stationary by the operator, the clutch
plate 76 will also be maintained in a station-
ary state. In this situation, the clutch plate 85
76 kinematically experiences a counterclock-
wise rotation with respect to the clutch
housing 78, and therefore the clutch will
override or freewheel as previously
described during coasting. The action of 90
the springs 91 on the pawls 86, however,
serves to maintain the pawls 86 in at least
a slipping state of engagement with the
drum face 94 of the clutch housing 78 at
all times, regardless of rotational direction. 95
Because of this slipping engagement, the
motion of the rotating clutch housing 78
during coasting creates a dragging force
on the clutc.h plate 76 which causes the
plate 76 to rotate slowly and the yoke 44 100
to continue moving slowly unless the oper-
ator holds the yoke 44 stationary. In this
manner, the dragging force serves to gently
pull on the yoke 44 to indicate to the
operator the proper direction the yoke 105
should be moved to continue power strok-
ing.

The dragging force also serves to carry
the driving link 72 and the crank link 74
past the 0° and 180° positions where they 110
might otherwise deadlock and prevent
rotational driving of the clutch in any
direction. For example, upon resumption of
power stroking after coasting, the dragging
force rotates the links 72 and 74 past a 115
possible dead center position as soon as
the operator momentarily releases the yoke
44 from a stationary position before again
moving the yoke in a direction to drive
the cycle. In the event that the cycle is 120
stopped with the links 72 and 74 in a dead
center position, the operator can alleviate
the problem simply by manually pushing
the cycle forward to start rotating the rear
wheel. Such rotation imparts a dragging 125
force on the clutch plate 76 to carry the
links past dead center, as well as to gently
pull the yoke 44 in the direction in which
it should be moved to drive the cycle.

Steering of the cycle is accomplished 130

5

1 469 363

5

through linkages 103 mounted alongside
the driving yoke 44. As previously men-
tioned with reference to Fig. 2, the handle
bar 64 has a stem 66 which is rotatably

5 secured to the top of the driving yoke 44.
As shown in Figs. 2 and 7, a rotator link
104 has one end fixed to the stem 66 and
extends outwardly therefrom. A second
rotator link 105 is pivotally connected be-

10 tween the extended end of the first link
104 and an end of a third rotator link 106.
The other end of the third link is fixed
to the top of a steering rod 107. This link-
age is effective to transmit rotation of the

15 handle bar 64 successively through the
links 104, 105, and 106 to rotate the steering
rod 107. The lower end of the steering rod
107 terminates in the upper portion 109 of
a universal joint 110. As shown in detail

20 in Fig. 8, the universal joint 110 is sup-
ported in position by a bracket 112 which is
secured by bolts 113 to the second part 58
of the clamping block 27. The bracket 112
serves to position the universal joint 110

25 substantially on the oscillatory axis of the
driving column.

The lower portion 111 of the universal
joint 110 extends through the bracket 112
and is fixedly coupled as by a clamping bolt

30 114 to a steering link 116. As shown in
Fig. 3, the link 116 extends laterally out-
wardly from the frame and is pivotally
coupled at its other end to one end of the
steering bar 20. The other end of the steer-

35 ing bar 20 is pivotally coupled to a link
118 which is secured to one tine of the
front wheel fork 28. The link 118 extends
laterally outwardly from the fork 28 in
general parallel relationship to the steering

40 link 116.

The direction of movement of the cycle
is controlled by the relative rotational posi-
tion of the handle bar 64. When the handle
bar 64 is rotated with respect to the driving

45 yoke 44, the rotator link 104 turns along
with the handle bar 64 and acts through
the second and third links 105 and 106 to
rotate the steering rod 107 about its own
axis. The steering rod rotation is trans-

50 mitted through the universal joint to the
steering link 116, which, in turn, acts
through the steering bar 20 and the link
118 to impart the rotational motion to the
front wheel fork 28 to turn the front wheel.

55 The lengths of the links 104, 105. and
106 need only be sufficient to effectively
transmit the rotational motion of the handle
bar 64 to the steering rod 107. However,
the lengths of the steering links 116 and

60 1 1 8 should be sufficient to maintain a degree
of clearance between the bar 20 and the
wheel 14 during a normal turning motion.

The steering mechanism of this cycle
operates totally independently of the driv-

65 ing mechanism, although they are both part

of the same assembly 16. The driving yoke
44 is oscillatingly movable about the axis
of the spindle 52 in the plane of the frame
10 under forces applied to the handle bar
64 and the f ootrests 70 by the operator. The 70
yoke 44 cannot be rotated about its longi-
tudinal axis nor can it be moved across or
out of the plane of the frame. When the
cycle is to be turned to the left or to the
right, the handle bar is rotated with respect 75
to the yoke to rotate the rod 107 which is
oscillated with the yoke 44. The universal
joint 110 permits the turning motion of
the handle bar 64 to be transferred from
the rod 107 to the steering link 116 there- 80
below, irrespective of the angular relation-
ship between them. Therefore, propulsion
of the cycle is accomplished solely through
the oscillator of the driving yoke 44, and
steering is accomplished solely through the 85
rotational movement of the handle bar 64
relative to the yoke 44. Since the universal
joint 110 is disposed substantially on the
oscillatory axis of the yoke 44, the move-
ment of either does not effect the other in 90
any way.

Braking can be accomplished through the
use of a conventional caliper-type hand
brake. While such brakes are not shown
in the drawings for purposes of clarity, 95
they can be readily mounted to one or both
wheels and controlled by hand grips
mounted on the handle bar.

The cycle which has been described is
particularly well-suited to develop muscles 100
in arms, legs, and torso, separately or
in arms, legs and torso, separately or to-
gether in varying combinations. The dis-
tance between the seat 40 and the
driving assembly 16 can be easily and 105
quickly adjusted to increase or de-
crease the torso involvement required
to drive the cycle. Moreover, the length
of the driving stroke and the torque re-
quired to drive the cycle can be 110
selectively varied by increasing or decreas-
ing the effective length of the crank link
74.

WHAT WE CLAIM IS: —

1. A cycle, comprising a frame having 115
a seat mounted thereon, rotatably mounted
front and rear wheels, said front wheel
being carried by a 'member pivotally
mounted to said frame to permit steering
of the cycle, an upwardly extending driving 120
column pivotally mounted intermediate its
ends to said frame for oscillatory movement
in a plane parallel to the plane of said
frame, a one-way clutch rotatably mounted
on said frame, said clutch having a first 125
part and a second part, said first part driv-
ingly engaging said second part upon rota-
tion of said first part in a first direction
relative to said second part to drive said
second part in the same direction, said first 130

6

1 469 363

6

and second clutch parts being in slipping
engagement in the event of rotation of said
first part relative to said second part in the
opposite direction to said first direction, a
5 driving link pivotally coupled to said
column and to said first clutch part to
rotate said first clutch part in said first
direction relative to the second clutch part
in response to pivotting movement of said
column in one direction about its pivotal
mounting to said frame; means coupling
said second clutch part to said rear wheel
to transmit rotational motion of said second
clutch part to said rear wheel, a steering

15 rod rotatably mounted on said driving
column for rotation about its own axis and
for oscillation with said column, the axis of
said steering rod being parallel to said
column, a handle bar rotatably mounted to

20 the upper end of said column and coupled
to said steering rod for oscillating said
column and for rotating said rod in
response, respectively, to oscillatory and
rotary forces applied thereto, a universal

25 joint at the lower end of said steering rod
and disposed substantially on the oscillatory
axis of said column, and means coupling
said universal joint to said member carrying
the front wheel to turn said front wheel in

30 response to rotation of said steering rod.

2. A cycle as set forth in claim 1, where-
in a footrest is mounted on said driving
column and extends outwardly therefrom.

3. A cycle as set forth in claim 1 or
35 2 t wherein said seat is mounted on said

frame above the level of said rear wheel
and to the rear of said driving column.

4. A cycle as set forth in any preceding
claim, wherein said driving Link is pivotally

40 coupled to said driving column at a point
disposed below the oscillatory axis of said
column.

5. A cycle as set forth in any preceding
claim, wherein said frame comprises a

45 generally horizontal front bar disposed
above the level of said front wheel, said
member carrying the front wheel compris-
ing a steering fork pivotally coupled to the
forward end of the said front bar and ex-

50 tending generally f orwardly and downwardly
therefrom in the plane of the frame, a
generally horizontal rear bar disposed
below and to the rear of said front bar and
having a second fork coupled to the rear-

55 ward end thereof, extending rearwardly
therefrom and carrying the rear wheel,
and a center bar interconnecting said front
and rear bars, said driving column being
pivotally mounted to said center bar inter-

60 mediate the ends of that bar.

6. A cycle as set forth in claim 5, fur-
ther comprising a generally horizontal seat
bar extending rearwardly from said center
bar to lie above said rear wheel, and means

65 connected between said second fork and

said seat bar for supporting said seat bar
above said rear wheel, said seat being
adjustably mounted on said seat bar to the
rear of said driving columns,

7. A cycle as set forth in any preceding 70
claim, wherein said driving column com-
prises a pair of parallel bars mounted
intermediate their ends on a spindle and
laterally interconnected by a plurality of
spacers, said spindle being mounted in a 75
clamp, and said clamp being fixed to said
frame to permit oscillation of said bars
about the axis of said spindle in a plane
parallel to the plane of said frame.

8. A cycle as set forth in any preceding 80
claim, wherein said first clutch part com-
prises a clutch plate and said second clutch
part comprises a clutch housing having a
drum face formed thereon, said clutch plate
carrying a plurality of pawls mounted on 85
one face of said plate and operably engage-
able with said drum face upon rotation of
said clutch plate in said first direction to
cause said clutch housing to rotate in said
first direction, said pawls being spring- 90
loaded so as to be in slipping engagement
with said drum face when said clutch plate

is stationary relative to or rotating in the
opposite direction relative to said clutch
housing. 95

9. A cycle as set forth in any preceding
claim, wherein said means coupling said
second clutch part to said rear wheel com-
prises a first sprocket wheel secured to said
second clutch part and rotatable therewith, 100:
a second sprocket wheel secured to said
rear wheel and rotatable therewith, and a
sprocket chain in mesh with said first and
second sprocket wheels to transmit rota-
tional motion of one of said sprocket wheels 105
to the other of said sprocket wheels.

10. A cycle as set forth in any pre-
ceding claim, including a crank link with
a plurality of holes disposed along the
length thereof, said crank link having one 110
end fixedly mounted to said first clutch
part, and wherein said driving link is pivot-
ally coupled to said crank link at one of
said holes.

11. A cycle as set forth in any pre- 113
ceding claim, wherein said handle bar is
coupled to said steering rod by means com-
prising a first link secured to said handle
bar and rotatable therewith and extending
radially outwardly therefrom, a second 120
link pivotally connected to said first link,
and a third link secured to said steering
rod and pivotally connected to said second
link whereby rotation of said handle bar

is transmitted through said links to rotate 125
said steering rod.

12. A cycle as set forth in any pre-
ceding claim, wherein said means coupling
said universal joint to said member carrying

the front wheel comprises a first steering 130

7

1 469 363

7

link secured to said universal joint and
rotatable therewith and extending outwardly
therefrom generally normal to said steering
rod, a second steering link secured to one
5 side of said front wheel carrying member
and disposed generally parallel to said first
steering link, and a steering bar pivotally
connected to said first and second steering

links.

13. A cycle substantially as herein 10
described with reference to and as shown
in the accompanying drawings.

A. A. THORNTON & CO.
Northumberland House
303-306 High Holbora
London WC1 V 7LE England

Printed for Her Majesty s Stationery Office by The Tweeddale Press Ltd., Berwick-upon-Tweed, 1977.
Published at the Patent Office, 25 Southampton Buildings, London, WC2A 1AY, from which copies

may be obtained

1469363 COMPLETE SPECIFICATION

2 SHEETS ThlS rfrovv/n £ /s a reproduction of
the Original on a reduced scale

Sheet 1

1469363 COMPLETE SPECIFICATION

2 SHEETS ^ <* r <>"ii>g 's a reproduction of
the Original on a reduced scale

Sheet 2